Machine for grinding glass bottles and other articles.



L. N. BRUN ER. MACHINE FOR GRINDING GLASS BOTTLES AND OTHER ARTICLES.

APPLICATEON FILED NOV-8.1916.

1 Patented Apr. 22, 1919.

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L. N. BRUNER. MACHINE FOR GRINDING GLASS BOTTLES ANDOTHER ARTICLES.

APPLICATION FILED NOV. B11916.

IIIIII II I IIIII II II I Q H I jaw/wiezrww MACHINE FOR GRINDING GLASS BOTTLES AND OTHER ARTICLES.

Specification of Letters Patent.

Patented Apr. 22, 1919.

Application filed November 8, 1916. Serial No. 130,283.

To all whom it may concern:

Be it known that I, LOUIS NAGLEE BRU- NER, a citizen of the United States of America,residing at 7 Bellerivestrasse, Zurich, Switzerland, glass manufacturer, have invented certain new and useful Improvements in Machines for Grinding Glass Bottles and other Articles, of which the following is a specification.

This invention has reference to machines for grinding, glass bottles and other articles, and is designed more particularly to provide a machine for automatically grinding the outer surfaces of bottle'mouths, so that the mouths of any number of bottles can be made all exactly alike.

The invention is very advantageous in connection with the known system in which the same stopper or cap will fit any one of the bottles thus securing the advantage of interchangeability and obviating the necessity for separately grinding each bottle for its own stopper or cap in the ordinary way.

A feature of the invention consists in an ranging the bottle so that it is automatically inserted in a chuck arrangement by a rotary feed drum, and a grinding disk or wheel is then caused to act on the portion to be ground while the bottle is rotated around its axis, this disk while operating moving to and fro sidewise. The operative edge of the disk is acted on by a diamond device to keep italways exactly true, and an automatic adjusting device having a micrometer action, is provided to feed the disk forwardby the necessary amounts to make up for wear.

Another feature of the invention is that all the operations are performed automatically under the control of cams, by the machine itself, so that all the operator has to do is to place the supply of unground bottles in the feed chute or hopper hereinafter mentioned. 7

After the grinding, thevbottle is released by the chucks and the feed drum rotates sulficiently to bring the next bottle into position, the ground bottle being dropped outinto a receiver. At the same time a fresh bottle drops from the aforesaid-feedchute or hopper into a cell or cavity in the drum, ready to becarried atthe next movement. of the latter, into the grinding position.

In order that the invention may be clearly understood and readily carried into effect reference will now be had to the accompanying diagrammatic drawings in which 2- Figure 1 is a side view, and

Fig. 2 is a plan of one example of the improved machine.

Fig. 3 is a detail end view of the feed drum.

In this example of apparatus according to the invention, A is the feed drum which is provided with three receiving cavities, cells or recesses A disposed around it at equal distances apart, and so arranged that as they successively pass the position 1 (Fig. 3) they can each be supplied with a bottle 0; automatically or otherwise.

As the drum A rotates, the bottle a is brought into the grinding position wherein it lies in line with a centering pin or cone 5 over which its mouth will fit, and with a chuck or holder 0 which has previously been drawn back out of the way, but which is adapted to grip its rear end. This rear chuck is now moved up toward the bottom of the bottle to clamp the latter in place a cushioning spring 0 being combined with the chuck to allow for slight inequalities in the length of the bottles. The bottle lies looselyin the recess A and the action of the cone Z) and chuck c is such as to lift it up slightly so that under the action of the belt pulley h, it can revolve in the said recess quite freely but clear of the walls thereof.

The movement of the chuck is effected by a lever (Z and a second lever (Z a connecting rod 6 and a lever f worked by a cam g on the main shaft 9. This shaft is supported in bearings g".

Constant rotary motion is imparted to the aforesaid centering cone 6 and chuck 0 by the pulley h. This pulley drives the chuck 0 directly, and it also drives the cone 6 at exactly the same speed by a suitable train of gears z,- i 2' i Of these i and '5 are mounted on a shaft i which is thus constantly rotated.

The grinding wheel 71: is mounted on an adjustable slide or carriage Z61 and is driven by a belt-pulley 70 It is caused to work toand-fro sidewise on a saddle 76* during the grinding by an adjusting link $2 a cam 01 and a suitable set of levers 0. The link 70 is adjustably connected toa swiveling block is? carried by a bearing 765 at the end of one of the arms or levers 0.

Hence when the bottle is held in or gripped by the chuck, itimmediately rotates therewith, and the grinding wheel 72 is then moved toward it for instance by a suitable cam 9 so as to grind the outer or tapered surface a of the bottle mouth. The said cam 9 acts for instance through a forked lever, the prongs m of which (see in plan in Fig. 2) engage in a grooved collar m" on a feed-screw m The adjustmentto make up for wear of the tool itself, which is extremely slight, may be effected by turning the feedscrew m by a hand-wheel m or by a micrometer feed such as described in the specificatio'n' of my-concurrent application Serial No. 131163.

When the grinding is finished, the cam 9 moves the chuck back again, so releasing the bottle; Then a clutch p, which transmits'motion to the feed drum A, is put into engagement until it has caused the feed drun'r to make one-third of a revolution.

The step-like movement is given to' the drunr A by a'pinion 1 being; transmitted through the clu'tohp, of which the fast or right-hand revolving part is driven by gears *rrR. Of these, the gear 9" is fast on the shaft 71".

The pinion 1' is, at the proper times,

thrown into action'by a cam g and lever g which control the clutch p. The pinion T has a nib 1 whichrides on to the end surface cylinder A to give one-third of a turn, to

bring a fresh bottle into position for grind- 1ng.-

The carborundu'm wheel is (Fig. 2') is then actuated, and trues up the outer surface a of the bottle mouth, accuracy being insured by the action of a gage diamond s in the known manner.

Alongside the cam g is another canr g which as stated moves the grinding wheel saddle 70* toward and from the bottle mouth. These two cams, and also earn Q at the lefthand end of the same shaft g, are driven from a pulley- Q) at the right-hand end through a train of gears tt The'cam n near-the pulley '0 which serves for'traversing the grindii-ig wheel backward and forward along the mouth a is fast to the wheel 25 but is loose on the shaft 9 and rotates much more rapidly than the said shaft. The shaft g for instance may make one revolutionper minute while cam n may make about ten, which of course gives position and drops out, and the next bottle (in the right hand cavity) comesinto the grinding position, after which the above operationsa're repeated, a fresh bottle enteringthe cavity which waspreviously at the bottom but has now moved to the righthand position. a

The feed dr'umis mounted'on two'fixed sleeves A A one at each-endthereof, and isdirectly connected with the gear Wheel 1 which drives'it, by aneck or hubpoi tion A Obviously the invention may b'e ln'odifietl in various ways in' carrying: the same into" practlce wlthor'it'dep'artnig from the general nature thereof.

I cla11n:-

1: In a machine for gri'irding 'g'lass bottles,

the-combination of'a clrucl'r'arrangement'for h oldingthe bottle atboth ends, a rotary feed drum, a grinc'liirg disk and cams'for' auto" matically controlling' theaction of said I chuck, drum and dislq -subs'tantially' as described.

2'. In a grinding m'aclvinethe' combination of a'chuclr-for holding the article at each end, a grinding apparatus; cams for control ling said chuckand for moving the grinding apparatusu to and fronr the-work at the proper times, and a feed drum with re'-' chuck being so arranged that it raises the article slightly when gripping it and thus pern its it to rotate whilesti'l'l in the recessof the drum.

3. In a machine for grinding glass'bottles the combination of a feed drunrhavirrg-are' cesses to rece ve the bottles, a chuck arrangement which lrfts the bottleslrghtly" when gr1pp1ng 1t, a reciprocating grindlng mechanism, and cams allmounted on one and the same shaft for controlling the action o'fsa'i'd 1 copies of this patent maybe obtained for five cents each, by addressing" the Commissioner ofPatents,

Washington, D. 0. 

